package com.example.checkboxtest,

  。

import android.annotation.SuppressLint; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.os.Handler; import android.os.Message; import android.util.AttributeSet; import android.view.MotionEvent; import android.view.View; import android.view.ViewGroup; import android.widget.Toast,

public class MyView extends ViewGroup {     View leftView = null;     View rightView = null,

    public MyView(Context context, AttributeSet attrs) {         super(context, attrs);         View view = new View(context, attrs);         view.setBackgroundColor(Color.BLACK);         this.addView(view, 0);     } 。

    /**      * 测量      */     @SuppressLint("DrawAllocation")     @Override     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {         if (getChildCount() != 2) {             try {                 // 自定义Exception                 throw new Exception() {                     @Override                     public void printStackTrace() {                         System.err.println("MyView中只能存在一个View");                         super.printStackTrace();                     } 。

                };             } catch (Exception e) {                 e.printStackTrace();             }         }         leftView = getChildAt(0);         // 设置leftview的高和宽         leftView.measure(widthMeasureSpec, heightMeasureSpec);         rightView = getChildAt(1);         // 设置rightview的高和宽         rightView.measure(widthMeasureSpec, heightMeasureSpec);         super.onMeasure(widthMeasureSpec, heightMeasureSpec);     } 。

    /**      * 布局      */     @SuppressLint("NewApi")     @Override     protected void onLayout(boolean changed, int l, int t, int r, int b) {         System.out.println(l + "," + t + "," + r + "," + b);         if (leftView != null & rightView != null) {             // 设置leftview的位置,在屏幕右侧(初始不可见)             leftView.layout(-r, 0, 0, b);             // 设置rightView的位置,在屏幕中             rightView.layout(l, t, r, b);         }     } 。

    @Override     protected void onDraw(Canvas canvas) {         super.onDraw(canvas),

    } 。

    @SuppressLint("NewApi")     @Override     public boolean onTouchEvent(MotionEvent event) {         final float X = event.getX();         float Y = event.getY();         switch (event.getAction()) { 。

        case MotionEvent.ACTION_MOVE:             System.out.println("X:" + X);             if (X < 100) {                 scrollTo(0, 0);             } else if (X > rightView.getMeasuredWidth() - 100) {// 当用户滑动至离右边缘100时,页面关闭                 new Thread(new Runnable() {// 新建线程,滑动关闭                             @Override                             public void run() {                                 for (int i = 0;; i++) {                                     try {                                         Thread.sleep(10);// rightView每隔10ms右移3,保证滑动流畅                                     } catch (InterruptedException e) {                                         e.printStackTrace();                                     }                                     int len = (int) (X + 3 * i);                                     // System.out.println("len:" + len);                                     Message message = new Message();// android中非UI线程不允许直接操作控件,可以将消息发送至主线程的handler类                                     if (len >= rightView.getMeasuredWidth()) {                                         message.what = 1;                                         handler.sendMessage(message);// 发送消息                                                                         // 关闭View                                         break;                                     } else {                                         message.what = 0; // 发送消息 自动滑动                                         handler.sendMessage(message);                                     }                                 }                             }                         }).start();             } else {                 scrollTo((int) -X, 0);                 // 计算透明度信息                 float alpha = (float) (1.0 - (float) (1.0 / 400) * X);                 // System.out.println("alpha:" + al);                 // 设置透明度                 leftView.setAlpha(alpha);             }             break;         }         // 设置true,消费event事件,不在向外传递         return true;     } 。

    @SuppressLint("HandlerLeak")     Handler handler = new Handler() {         @SuppressLint("NewApi")         @Override         public void handleMessage(Message msg) {             if (msg.what == 0) {                 scrollBy(-3, 0);// viewgroup向右滑动3             } else if (msg.what == 1) {                 Toast.makeText(getContext(), "关闭", 50).show();                 setVisibility(View.GONE);// 设置viewgroup不可见(隐藏)             }         } 。

    }; } 。

<com.example.checkboxtest.MyView         android:layout_width="fill_parent"         android:layout_height="fill_parent" > 。

  。

        <View             android:id="@+id/rightview"             android:layout_width="fill_parent"             android:layout_height="fill_parent"             android:background="#ff0000" />     </com.example.checkboxtest.MyView> 。

//新建一个Fragment
Fragment bFragment = new BFragment();
getFragmentManager().beginTransaction().add(R.id.fragment, bFragment).commit();